Film tensioning and framing device



Nov. `3 I 1925.

A. F. 'VICTOR FILM TENSICIZING LND FRAMING DEVICE Filed Dec. 10. -1923 Patented Nov. 3, 1925.

mln VICTOR, 'OI' DAVENPORT, IOWA.

m TENSION'ING AND FmING DEVICE. I

Application nled December 10, 1928. Serial No. 679,802.

To all whom it my concem.'

Be it known that I, ALExANDEa FERDI- NAND Vieron, a subject of the' King of Sweden, and resident of Davenport, in the county of Scott and State of Iowa, have invented certain -new and useful Improvements in a Film Tensioning and Framin Device, of which the following is a fu. clear, and exact description, such as will enable others skilled in the art to make and use the same.

My invention relates to motion picture appliances and more articularly to a structure that is ada te to maintain a tension upon the lm w le it is being moved past the apertured element or lm guide and which, at the same time, may be readily adjusted for the purpose of framing the picture upon the screen.

Divers structures have heretofore been devised exerting' a sli ht tension u n the longitudinal edges o the film so t at during the momentary stoppage of the lilm during its intermittent movement through the uide it will remain stationary while one of t e series of Victiiri 'is being exposed. This tension or friction will also prevent the film bein moved too far or be ond the light opening y the actuating mec anism which usually operates at a hi h rate of speed and mi ht throw or whip the film beyond its pre etermined stoplping oints when being released. Also, t ere ave been designed divers structures for framing or centerin the film in front of the aperture so that te projected picture will be properly disposed upon the screen. ""It is an object of my invention to rovide a single or unitary structure that will perform both the functions of framin the picture and exerting a tension upon the film during its passage past the projecting or light aperture. It is a further object o my invention to provide a structure of this character that is extremely simple in construction and which may be readily manipulated by persons unskilled in cinematography. Still further objects reside in roviding a combined framing and tensioning device for film that may be readily fabricated from sheet metal by stamping operations which is dependable' Y 1n performing its functions, which is novel in construction, and which is economical to manufacture.

I prefer to carry out my invention 1n substantially the manner shown in the drawchannel' formed thereby ings ,and hereinafter described, the drawigure 2 is an elevation of the presser` plate and framer detached.

Figure 3 is a transverse section on line 3-3 .of vFigure 1.

Figure 4 is a transverse section on line 4--4 of Figure 2. a

lFigure 5 is an enlarged transverse section of the presser late.

Referring to the rawings, 10 designates a suitable standard or support in a motion icture projection apparatus, the front or orward end of which has transversely secured to it a vertical plate 11 that extends down to a suitable-fiat base 12.- Spaced a slight distance from plate l1 is a disk 13 and between these elements rotates a shutter 14 of any suitable design. The lens tube 15 is mounted upon the outer plate 13, while back of and spaced a suitable distance from the transverse plate 11 is a film ide. This film guide comprises a vertica ly disposed elongated plate 16, the longitudinal vertical ed es thereof being flanges laterally to provie opposite parallel walls 17 and 18, which, with the plate 16, provide a channel or guide of suliicient width to accommodate the film ribbon .F. The film passes downwardly in the channel of this guide and Bast an aperture 19 therein, and it is moved y means of any suitable shuttle or other film actuating mechanism. In the drawings I have illustrated, merely for the purpose of convenience, a film moving mechanism such` as disclosed in my copending application which is executed under even date herewith, led December 10th, 1923, Serial Number 679,798 and which need not be herein described as it forms no portion of my present invention. Under ordinary conditions, that is without a tension or presser member, the film would probably be moved laterally away from the ide plate 16 during the operation of the ceding device, and it is for the purpose of maintaining the film in intimate relation to this plate 'and the that I have de signed my present presser element.

This presser element comprises a vertically elongatedplate 20 havin .its upper and lower end portions 21 curve outwardly away-from -the plate 16, and at a point opposite the aperture 19 I place Van aperture 22 that is of slightly smaller dimensions than said first-mentmned aperture but is of sub-V stantially the dimensions of the pictures upon the film. `A bowed spring 24 has itsr upper end engaged with the central portion of` the presser plate 2() and is loosely pivoted thereon by means of a` rivet 25. As seen in the detailed drawing, (Figure 4), I form an opening for the rivet 25 and a countersunk depression 26 inY the plate 20 surrounding the opening for the rivet. The adjacent .end portion' of the spring 24 is also provided with an opening into which this rivet is inserted and set. by swaging the metal of the rivet over upon the surface ofthe'presser plate 20 against the film which is interposed between the same and the guide'plate 16. In order that the loperator vmay readily frame the picture upon the screen and adjust the aperture 22 in the presser plate so as to be in exact registry with a picture during the momentary stoppage of the film, I have provided means for adjustin the presser plate vertically in the guide. t a point in the vertical. plate 11 opposite thelower portion of the spring I form an opening 27 that rovides a bearing to receive the shouldere or reduced concentric shank 28 of arotatable handle or thumb nut 29, the vouter 'portion of which is knurled or milled so that it may be conveniently grasped by the ingers4 of the operator `to rotate the same to adjust the presser plate vertically. Asmall screw 30 is loosely assed through a hole in the lower portion oi)- the spring and screwed into an eccentric threaded opening 31 formed in the shank 28 of the thumb nut. Thus it will be seen that-by rotating this nut 29 the screw will travel in an eccentric path about the axis of rotation thereof and will thereby move the lower end of the spring 4 in a correspondin path. Owing to the fact that the upper en of the spring is pivotally mounted with respect to the presser plate 20, and the latter can move only in a vertical direction, the upper end of the spring will be reciprocatedsup and down to adjust the presser plate vertically with respect to the guide plate 16. This will move the aper-` ture 22 inthe presser plate vertically with respect to the opening 1n the guide plate l an complished durlng the passage of the ilmit is obvious j through the guide lwithout disturbing the other mechanism.

What I'claim isz- 1. A framing and tensioningdevice for film comprising a guide plajte, a presser coactin therein, means for supporting and yieldingly urging said presser plate towards the gui e plate, and devices for moving said means longitudinally with respect tov said guideplate `wherebysaid aperture may be brought into registry with a pictureupon the lfilm. A

2. The framing and tensioningv device comprising a guide plate,v a presser plate co-acting therewith and provided with an aperture, means having swivel connection with the said tension plate for supporting .the latter and urging the same normally towards said guide plate, and devicesfor shifting'said means and said presser plate lolngitudinally with respect to said guide p ate.

3. A framing and tensioning device for film comprising a film guide, an apertured presser plate co-acting therewith, a spring supporting and urging said presser plate towards said guide, and means for' moving said spring longitudinally whereby said presser plate is correspondingly moved with respect to said guide.

4. A framing and tensioning device for film comprising a guide, an apertured presser plate coacting therewith, a bowed spring having swivel connection at its upper en'd with the said presser plate whereby the latter is supported, and means co-acting' with the opposite end of said spring for therewithand having apertures.

maintaining the same under tension and for reciprocating the same longitudinally where-4 by the aperture in nsaid presser 'plate is ladjusted with respect to a picture upon the frame.

5. A framing and tensioning device for film comprising a guide, an apertured presser plate co-acting therewith, a bowed spring having swivel connection at its upper end with said pressern plate whereby the latter is'supported, and a camelement connected to the lower end of said spring and supporting the salne whereby the movement of said cam-element adjusts` said presser plate longitudinall to adjust the picture upon the frame with the aperture in said plate.

6. A framing andtensioning device for lm comprising a vertically disposed film guide, a vertically reciprocable apertured presser plate co-acting spring supporting said yieldingly maintaining t e same in co-action with said guide, and devices for actuating said spring to reciprocate said presser ate. p 7. A framing, and tensionin device for film comprising a vertically lsposed film guide, a vertically reciprocable apertured presser ilate co-actin therewith2 a bowed spring aving yielda le connection at its upper end with said presser plate for supwith ysaid guide, a

resser plate and porting the latter and urgin vthe same toward said guide, a rotatable and nut, and a pin eccentrically mounted upon the said hand nut and operatively connected' to the lower portion of said'sprin whereby the rotation of said hand nut bo ily moves said spring which causes n a longitudinal movement of said presser plate.

Signed at Davenport, count of Scott and State of Iowa, this 6th ay of De cember, 1923.

muren immun vlc'on. 

